// 云函数入口文件
const cloud = require('wx-server-sdk')

cloud.init()
const db = cloud.database()
const _ = db.command
// 云函数入口函数
exports.main = async (event, context) => {
  var uid = event.uid
  var pids = event.pids
  db.collection("coll").where({
    uid:uid
  }).update({
    data:{ 
      pids:_.pull(pids)
    }
  })

  
}